As I said above. I think you are looking at attenuated differences, at a time when generalities are being established....
Kinda like trying to teach a 7 year old to catch a 60 yard post pattern, in stride over his shoulder, rather then trying to first teach him to catch a ball.
i see we will see 4 harry potter characters dressed for halloween at the hobbes household this Oct. Have fun : )
NNB...We teach our children with crayons and bright images before we deal with long words in black and white -- it is no more complicated than that.
Further proof that GMTA.....lol